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Determine Correct Headspace

Gives the proper chamber headspace dimensions so you know a firearm is safe to fire. GO gauge gives the SAMMI-recommended, minimum chamber depth. NO/GO is slightly longer than the SAMMI-recommended to identify excessive chamber depth and an unsafe condition. Precision-ground and hardened to provide long service life.

MIXING AND MATCHING BRANDS OF HEADSPACE GAUGES - Don't do it!! That's the short answer, here's why. It boils down to tolerance stacking. Each Headspace Gauge manufacturer works within a range specified by SAAMI. Manufacturer "A" may work at the high end of the range while Manufacturer "B's" gauges are in the middle of the tolerance range. Mixing the two could give an inaccurate reading. By sticking with one brand within a particular caliber, you will eliminate a variable. If you have a Forster, .308 GO gauge, get a Forster, .308 NO GO. Use Clymer with Clymer and Manson Precision with Manson Precision, etc. You can use any brand of headspace gauge with any other brand of chambering reamer. e.g. Forster Headspace Gauges with Clymer Reamers, Manson Precision Gauges with JGS Reamers, etc.


AR-15, Issue:11, Page:087
Big Book Catalog, Issue:69, Page:085
Big Book Catalog, Issue:69, Page:460

SPECS: M7 high speed steel, in-the-white, hardened.

MANSON PRECISION - RIMLESS RIFLE/SHOTGUN CARTRIDGE HEADSPACE GAUGES

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Cartridge: 204 Ruger

Style: Go Gauge

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Cartridge: 204 Ruger

Style: No Go Gauge

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Cartridge: 220 Swift

Style: Go Gauge

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Cartridge: 223 Remington

Style: Go Gauge

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Cartridge: 223 Remington

Style: No Go Gauge

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Cartridge: 22-250 Remington

Style: Go Gauge

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Cartridge: 22-250 Remington

Style: No Go Gauge

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Cartridge: 22-250 Ackley

Style: Go Gauge

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Cartridge: 6.8 mm Remington SPC

Style: Go Gauge

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Cartridge: 6.8 mm Remington SPC

Style: No Go Gauge

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Cartridge: 7 mm WSM (Winchester Short Magnum)

Style: Go Gauge

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Cartridge: 7 mm WSM (Winchester Short Magnum)

Style: No Go Gauge

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Style: Go Gauge

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Style: No Go Gauge

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Cartridge: 7.62 x 39 mm

Style: Go Gauge

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Cartridge: 7.62 x 39 mm

Style: No Go Gauge

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Cartridge: 7.62 x 39 mm

Style: Go Gauge

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Cartridge: 7.62 x 39 mm

Style: No Go Gauge

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Cartridge: 30 Carbine

Style: Go Gauge

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Cartridge: 30 Carbine

Style: No Go Gauge

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Cartridge: 243 Winchester, 6.5/308 Winchester, 7 mm - 08 Remington

Style: Go Gauge

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Cartridge: 243 Winchester, 6.5/308 Winchester, 7 mm - 08 Remington

Style: No Go Gauge

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Cartridge: 300 Remington Ultra Magnum

Style: Go Gauge

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Cartridge: 300 Remington Ultra Magnum

Style: No Go Gauge

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Cartridge: 300 WSM (Winchester Short Mag)

Style: Go Gauge

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Cartridge: 300 WSM (Winchester Short Mag)

Style: No Go Gauge

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Cartridge: 8 mm Mauser (8 x 57 mm Mauser)

Style: Go Gauge

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Cartridge: 8 mm Mauser (8 x 57 mm Mauser)

Style: No Go Gauge

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Cartridge: 270 Winchester, 30-06 Springfield, 35 Whelen

Style: Go Gauge

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Cartridge: 270 Winchester, 30-06 Springfield, 35 Whelen

Style: No Go Gauge

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Cartridge: 50 BMG

Style: Go Gauge

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Cartridge: 50 BMG

Style: No Go Gauge

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Cartridge: 12 Gauge

Style: Go Gauge

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Cartridge: 12 Gauge

Style: No Go Gauge

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Cartridge: 5.45 x 39 mm

Style: Go Gauge

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Cartridge: 5.45 x 39 mm

Style: No Go Gauge

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Cartridge: 6.5 Grendel

Style: Go Gauge

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Cartridge: 6.5 Grendel

Style: No Go Gauge

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Cartridge: 338 Lapua

Style: No Go Gauge

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Cartridge: 338 Lapua

Style: Go Gauge

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Cartridge: 7.62 x 25 mm Tokarev

Style: Go Gauge

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Cartridge: 221 Remington Fireball

Style: Go Gauge

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Cartridge: 221 Remington Fireball

Style: No Go Gauge

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Cartridge: 6.5 Creedmoor

Style: Go Gauge

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Cartridge: 6.5 Creedmoor

Style: No Go Gauge